Acoustic pressure calibrator

Details Acoustic pressure calibrator Acoustic pressure calibrator

2007-11-27

2007-11-27

Williams, Hezron (Department: 2856)

Measuring and testing

Instrument proving or calibrating

Apparatus for measuring by use of vibration or apparatus for...

C073S001710

Reexamination Certificate

active

10089735

ABSTRACT:
A sound pressure level calibrator, which is suitable for sound pressures to be measured in excess of 124 dB and which can be adapted to the installed sound pressure level sensor. This object is attained by a sound pressure level calibrator comprising a pistonphone and a high-pressure adapter connected to the output of the pistonphone. The high-pressure adapter acts as a resonator. With an expanded adapter opening the high-pressure adapter is connected in soundproof manner with the sound pressure level sensor, which is inserted into a structure. The invention can be used for a sound pressure level calibrator to calibrate a sound pressure level sensor, which is integrated into a structure.

REFERENCES:
patent: 4445378 (1984-05-01), Zuckerwar
patent: 4715219 (1987-12-01), Frederiksen
patent: 4909064 (1990-03-01), Talmadge
patent: 5567863 (1996-10-01), Larson et al.
patent: 42 17 624 (1992-03-01), None
patent: 0 006 833 (1980-01-01), None
patent: 05049097 (1993-02-01), None
PTO 05-1000, “Large Sound Pressure Provision Device For Measuring And Calibrating Microphone Characteristic”, English Language Translation of Japanese Published Unexamined Patent Application JP 05049097 A of Feb. 26, 1993.
International Search Report.
Barham, R. G., “The NPL Laser Pistonphone”, Journal of Low Frequency Noise & Vibration, pp. 36-38, 1993, UK.

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